This crate cannot be used together with other crates that use bitflags 1.3.x

[eduardosm]

Due to

bitflags = ">= 1.1.0, < 1.3.0"

if a crate depends (directly or indirectly) on nix and bitflags 1.3.x, there will be a dependency resolution failure.

The dependency should be specified as

bitflags = "1.1.0"

[asomers]

It's a bitflags bug. Bitflags raised its MSRV in a minor release. Nix had to change its bitflags specification as above in order to keep working on the MSRV. Note that the next release of Nix will use bitflags 1.3.0.

[eduardosm]

This will force users to use bitflags <1.3.0, even if their MSRV allows it. There are other ways of handling this, such as the approach used in the naga crate.

[asomers]

I'll release a new version of Nix that uses bitflags 1.3.0 as soon as the next libc release. Just waiting on rust-lang/libc#2388 .

[asomers]

@eduardosm I should mention that if you can't wait for the next release, your MSRV is >= 1.46.0, and you want bitflags 1.3.0, then you can set your Nix dependency to =1.22.0 (or =1.21.0, etc). The .0 releases will let you use bitflags 1.3.0.

The approach taken by the naga crate seems to be to repeat their MSRV testing with multiple versions of bitflags. That's waaay too much effort, IMHO. I won't be going that route with Nix.